核心高强钢管混凝土组合柱轴压承载力计算新方法
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摘要
在分析核心钢管混凝土组合柱受力机理的基础上,针对核心钢管混凝土组合柱管内混凝土与管外混凝土约束效应的不同,同时考虑圆形截面和方形截面对钢管外混凝土的影响,提出了一种核心钢管混凝土组合柱轴压承载力计算的新方法.应用该方法对16根核心钢管混凝土组合柱试件的轴压承载力进行计算,并与现有方法进行比较,结果表明:所提出的方法优于现有方法,其计算结果与试验结果吻合良好,能较为合理地评估核心钢管混凝土组合柱的轴压承载力.
Based on the analysis of the bearing mechanism of composite columns with core of high-strength concrete-filled steel tube,a new method to calculate the axial bearing capacity of the composite columns is proposed,which considers not only the difference in confinement effect between the concrete both inside and outside the tube,but also the influence of circular section and square section on the concrete outside the tube.The proposed method is then applied to the calculation of axial bearing capacity of 16 composite columns with core of high-strength concrete-filled steel tube,and the results are compared with those obtained by the existing methods.It is indicated that the calculated results accord well with the experimental ones,and that the proposed method is superior to the exis-ting methods because it can reasonably estimate the axial bearing capacity of composite columns with core of high-strength concrete-filled steel tube.
Based on the analysis of the bearing mechanism of composite columns with core of high-strength concrete-filled steel tube,a new method to calculate the axial bearing capacity of the composite columns is proposed,which considers not only the difference in confinement effect between the concrete both inside and outside the tube,but also the influence of circular section and square section on the concrete outside the tube.The proposed method is then applied to the calculation of axial bearing capacity of 16 composite columns with core of high-strength concrete-filled steel tube,and the results are compared with those obtained by the existing methods.It is indicated that the calculated results accord well with the experimental ones,and that the proposed method is superior to the exis-ting methods because it can reasonably estimate the axial bearing capacity of composite columns with core of high-strength concrete-filled steel tube.
引文
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[2]蔡健,谢晓锋,杨春,等.核心高强钢管混凝土柱轴压性能的试验研究[J].华南理工大学学报:自然科学版,2002,30(6):81-85.Cai Jian,Xie Xiao-feng,Yang Chun,et al.An experimen-tal research on the composite column with core of high-strength concrete filled steel tube under axial compressionloading[J].Journal of South China University of Tech-nology:Natural Science Edition,2002,30(6):81-85.
[3]幸坤涛,赵国藩,岳清瑞.高强钢管混凝土核心柱抗震性能的神经网络评估[J].工业建筑,2002,32(10):63-65.Xing Kun-tao,Zhao Guo-fan,Yue Qing-rui.Evaluation ofseismic properties of core column with high strength con-crete filled steel tube based on artificial neural network[J].Industrial Construction,2002,32(10):63-65.
[4]幸坤涛,赵国藩,岳清瑞.高强钢管混凝土核心柱轴压短柱的承载力研究[J].钢结构,2002,17(1):18-21.Xing Kun-tao,Zhao Guo-fan,Yue Qing-rui.Research onbearing capacity of axial compressed short core columnwith high strength concrete filled steel tube[J].SteelStructure,2002,17(1):18-21.
[5]李惠,吴波,林立岩.钢管高强混凝土叠合柱的抗震性能研究[J].地震工程与工程振动,1998,18(1):45-52.Li Hui,Wu Bo,Lin Li-yan.Study on seismic properties oflaminated column with high strength concrete containingsteel tube[J].Earthquake Engineering and EngineeringVibration,1998,18(1):45-52.
[6]李惠,王震宇,吴波.钢管高强混凝土叠合柱抗震性能与受力机理的试验研究[J].地震工程与工程振动,1999,19(3):27-33.Li Hui,Wang Zhen-yu,Wu Bo.Experimental research onmechanism and seismic performance of laminated columnwith steel tube filled with high-strength concrete[J].Earthquake Engineering and Engineering Vibration,1999,19(3):27-33.
[7]钱稼茹,康洪震.钢管高强混凝土组合柱抗震性能试验研究[J].建筑结构学报,2009,30(4):85-93.Qian Jia-ru,Kang Hong-zhen.Experimental study on seis-mic behavior of high-strength concrete-filled steel tubecomposite columns[J].Journal of Building Stuctures,2009,30(4):85-93.
[8]黄志辉,程丽荣,林立岩,等.钢管高强混凝土叠合柱核芯区抗剪试验研究与有限元分析[J].工业建筑,2001,31(7):50-53.Huang Zhi-hui,Cheng Li-rong,Lin Li-yan,et al.Experi-mental study and finite element analysis on shear behavior ofsteel tube fill high-strength concrete composite column corearea[J].Industrial Construction,2001,31(7):50-53.
[9]谢晓锋.高强钢管(骨)混凝土核心柱轴压性能的试验研究[D].广州:华南理工大学建筑学院,2002.
[10]Mander J B,Priestley M J N,Park R.Theoretical stress-strain model for confined concrete[J].Journal of Struc-tural Engineering,ASCE,1988,114(8):1804-1826.
[11]Sakino K,Nakahara H,Morino S,et al.Behaviour of cen-trally loaded concrete-filled steel-tube short columns[J].Journal of structural Engineering,ASCE,2004,130(2):180-188.
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